The Legend of Xiao Zhuang

The life story of Da Yu Er, an influential woman who oversaw three dynastic successions in the early Qing Dynasty. As a girl, Da Yu Er, the future Empress Dowager Xiao Zhuang, was a free-spirited princess roaming the Mongolian prairie and dreaming of marrying her love, Dorgon. But as fate would have it, she married his brother, Hong Tai Ji, in a political alliance. She struggled between her heart's desire and her responsibility to her clan.
(Source: DramaWiki)